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CVE-2022-48863: mISDN: Fix memory leak in dsp_pipeline_build()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-16 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: mISDN: Fix memory leak in dsp_pipeline_build() dsp_pipeline_build() allocates dup pointer by kstrdup(cfg), but then it updates dup variable by strsep(&dup, "|"). As a result when it calls kfree(dup), the dup variable contains NULL. Found by Linux Driver Verification project (linuxtesting.org) with SVACE.

Affected products

• Linux kernel: from 2.6.27 before 5.10.106; from 5.11 before 5.15.29; from 5.16 before 5.16.15 — fixed in 5.10.106, 5.15.29, 5.16.15

How to fix

Upgrade to a fixed version: Linux kernel 5.10.106, 5.15.29, 5.16.15. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/640445d6fc059d4514ffea79eb4196299e0e2d0f
• https://git.kernel.org/stable/c/7777b1f795af1bb43867375d8a776080111aae1b
• https://git.kernel.org/stable/c/a3d5fcc6cf2ecbba5a269631092570aa285a24cb
• https://git.kernel.org/stable/c/c6a502c2299941c8326d029cfc8a3bc8a4607ad5
• https://git.kernel.org/stable/c/640445d6fc059d4514ffea79eb4196299e0e2d0f
• https://git.kernel.org/stable/c/7777b1f795af1bb43867375d8a776080111aae1b
• https://git.kernel.org/stable/c/a3d5fcc6cf2ecbba5a269631092570aa285a24cb
• https://git.kernel.org/stable/c/c6a502c2299941c8326d029cfc8a3bc8a4607ad5

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